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Table 3 CAGE tags in different CGIs classes

From: Intergenic, gene terminal, and intragenic CpG islands in the human genome

CGI class 5prim intragenic 3prim intergenic total
#CGIs 15686 3095 1808 6848 27437
Fraction of CGIs, % 57.17 11.28 6.59 24.96 100
Total length of CGIs 13853661 1483283 1124521 4482821 20944286
Average GC-content, % 66.66 65.8 66.53 66.39 66.08
#CGIs with CAGE-tags 13361 1327 1005 3509 19202
Total length of CGIs with CAGE-tags 12756213 784565 780040 2925761 17246579
Fraction of total length of CGIs with CAGE-tags in class, % 92.08 52.89 69.37 65.27 82.35
Total CAGE-tags in CGI class 698369 7300 6520 52377 764566
Fraction of CAGE-tags in CGI class, % 43.7 0.46 0.41 3.28 47.85
CGIs with at least one CAGE-tag, % 85.18 42.88 55.59 51.24 69.99
Average CAGE-tags per CGI 45 2 4 8 28
Average CAGE-tags per CAGE-containing CGI 52 6 6 15 40
Density of CAGE-tags in CGIs, bp-1 0.0504 0.0049 0.0058 0.0117 0.0365
Density of CAGE-tags in CAGE-containing CGIs, bp-1 0.0547 0.0093 0.0084 0.0179 0.0443
One CAGE-tag per #bp 20 203 172 86 27
  1. Relative number of CGIs of different classes; CAGE tag representation and their frequency in different CGIs.